What can you do with one phrase of the hymn tune?

When you have your favorite hymn tune in front of you, naturally you can harmonize it in four parts and put it into soprano or tenor or the bass with or without the solo registration. But you can do something else, too.

In this video, I will show you what can you create using just one chorale phrase. If you apply this procedure to the entire hymn tune or a chorale, the result will be quite unexpected and colorful. This will be sort of like a preliminary step to create a real chorale fantasia.